#linuxcnc Logs

Mar 07 2020

#linuxcnc Calendar

12:52 AM JesseG: Haha. Last year I charged my customers $2233.06 in sales tax. I was supposed to have charged them $2233.18 - so I have to eat the loss of 12 cents. :P
12:57 AM XXCoder: damn that will get you in poorhouse
01:06 AM JesseG: Wheeeeeee. ugh. Just paid two property taxes, federal income tax, state sales tax, totaling almost $12k. I think I should have bought some rice and beans or beans and rice first. All said, we get to keep about 2/3 of what we work for :P
01:06 AM XXCoder: what country?
01:07 AM JesseG: USA
01:07 AM JesseG: It is fascinating though to watch society. At first when a new country is founded, taxes are low and most people are doing primary work. But as time goes by, there are more and more people working for the government in the roles of gathering and spending money earned by the first group.
01:07 AM JesseG: At some point there will be less people producing than there will be consuming and the whole thing will topple over :P
01:08 AM XXCoder: issue is theres so much tax money being spent to help rich people
01:08 AM XXCoder: for dollar of welfare theres maybe 1000 bucks for corprate welfare
01:08 AM JesseG: yeah
01:09 AM JesseG: although I wasn't thinking of the topheavy portion as being welfare recipients but rather administrators and administrators of administrators
01:10 AM JesseG: but anyway people as a species are hilarious. That's all I have to say on the matter :P
01:10 AM XXCoder: heh never perfect
01:10 AM XXCoder: you ever read "bullshit jobs" book?
01:10 AM XXCoder: i very highly recommand it
01:10 AM JesseG: LOL no...
01:11 AM XXCoder: https://www.librarything.com/work/21372389
01:13 AM JesseG: fascinating
01:14 AM XXCoder: yeah
01:14 AM XXCoder: note I very rarely read book thats not scifi and fantasy
01:14 AM XXCoder: and that book was truly amazing enjoyable and educational
01:41 AM XXCoder: JesseG: im making my 3d benchy the hard way
01:41 AM XXCoder: no 3d printer ;)
01:44 AM sensille: only a 5 axis cnc?
01:44 AM XXCoder: nah 2d machine
01:44 AM XXCoder: true 2d, it has no z
01:45 AM sensille: oh. 0.2mm sheets as slices
01:45 AM XXCoder: 3mm actually
01:46 AM XXCoder: so it wont be super smooth but thats the fun in ut
01:47 AM XXCoder: i also plan to do same with face pumpkin
01:49 AM XXCoder: this one https://www.thingiverse.com/thing:159638
01:50 AM XXCoder: wow someone made concerete ones. https://cdn.thingiverse.com/assets/be/81/8d/eb/24/95A261EE-B0D3-4C00-B957-AC3FD3CA02D7.jpeg
02:28 AM Deejay: moin
05:07 AM jthornton: morning
05:08 AM XXCoder: hey jt
05:31 AM jthornton: gotta drive back down to Memphis and get my Goldwing
05:31 AM XXCoder: fun
05:31 AM XXCoder: today I made 11 layers out of 95 of 3d benchy slice heh
05:31 AM XXCoder: laser machine is doing very very well
05:31 AM sensille: pic?
05:31 AM XXCoder: none yet
05:31 AM jthornton: yea and it's in east Memphis so a bit over 3 hours each way
05:31 AM sensille: XXCoder: 1:1?
05:31 AM XXCoder: sens nah bigger than normal size
05:34 AM XXCoder: jt it annoys me when someone tells me that 3 hours is easy
05:34 AM XXCoder: sure its easy for YOU who can hear music or have audio book whole way
05:35 AM jthornton: my longest road trip was from Poplar Bluff to Raceland La and back in the same day 1,100 miles
05:35 AM XXCoder: ow
05:35 AM XXCoder: not sure what it was for me, but it was vancouver to calfornia
05:36 AM jthornton: that was to retrieve my Spyder with a blown up engine
05:36 AM XXCoder: 500 miles or thereabouts
05:36 AM XXCoder: i saw hills to left and hills to right for hours
05:36 AM XXCoder: it was so amn dull
05:36 AM jthornton: the worst part is going through Memphis on I55
05:38 AM CaptHindsight: I would leave early afternoon from Chicago and have diner the next night in SF (~30 hours)
05:38 AM jthornton: wow
05:38 AM XXCoder: crazy
05:38 AM XXCoder: my bro did something similiar
05:38 AM XXCoder: middle of texas to vancouver in 2 days
05:39 AM CaptHindsight: had to get sleep the night before though
05:39 AM XXCoder: they arent crows so texas to wa route is quite a roundaround route
05:39 AM jthornton: I had dinner once at a place called Al Caps IIRC in SF took like 2 hours and 5 courses
05:39 AM CaptHindsight: worst was Chicago to NYC in 12 hours with no sleep the night before
05:40 AM XXCoder: dangerous. thats where you start feeling drunk (ssimiliar effects by lack of sleep)
05:40 AM CaptHindsight: yeah, was raining most of the way
05:44 AM CaptHindsight: some states are boring to drive through
05:45 AM CaptHindsight: some you hate to drive through at night since you miss all the scenery
08:02 AM Loetmichel: Hmm, the lights come along nicely. Two more on the corners and done... and i shoueld clean up my balcony :-) -> http://www.cyrom.org/palbum/main.php?g2_itemId=17745&g2_imageViewsIndex=1
08:04 AM Tom_L: pla or abs?
08:04 AM Tom_L: wonder how that will hold up in the weather
08:05 AM Loetmichel: pla
08:05 AM Loetmichel: it will do a couple years
08:05 AM Loetmichel: then it will eventually get brittle
10:23 AM pink_vampire: Loetmichel: look very nice!!
12:52 PM flyback: https://www.youtube.com/watch?v=grUdsTTRGl4
12:52 PM flyback: OWNS YOUR "CANUCK"
12:52 PM * flyback DROPKICKS Elmo42
01:25 PM veegee: What's the worst that could happen running this high flow air blow gun at 140 PSI?
01:25 PM veegee: https://www.amazon.ca/Flexzilla-Blow-Quiet-Flo-Safety-Nozzle-AG1402FZ/dp/B06VY8TW7J/ref=sr_1_8?keywords=air%2Bblow%2Bgun&qid=1583608680&sr=8-8&th=1
01:26 PM veegee: Flexzilla is pretty reputable but the max pressure rating isn't provided. They didn't respond to my email either.
01:26 PM CaptHindsight: explode
01:26 PM veegee: That's weird, because I can hold back 140 PSI on the nozzle with my thumb
01:27 PM veegee: I know you're not _supposed to_ run them higher than their rating but 140 PSI is really low pressure
01:27 PM veegee: I also have this one https://www.amazon.ca/Capri-Tools-Adjustable-Extended-Nozzle/dp/B07XKD629G
01:27 PM veegee: The smaller version of that is rated 150 PSI, but this high flow model is rated for 90 PSI
01:28 PM veegee: And the venturi nozzles really make a huge difference. I'm so glad I bought that DeVilbiss 447 15 HP pump
01:29 PM CaptHindsight: writers embellishment: explode and release delta radiation that turns you into a superhero
01:30 PM veegee: It's weird because the brass fittings and stuff that I'm using are rated for like 1,000 PSI
01:30 PM veegee: for air tools, the PSI rating makes sense for the proper operation of the tool. But for a blow gun which is just a valve in a housing, it's stupid
01:30 PM veegee: especially since I can hold back 175 PSI with my thumb against the nozzle...
01:32 PM veegee: Yeah there's no way even a shitty pure plastic 3D printed blow gun is that weak.
01:32 PM CaptHindsight: do you get out of the house much? Have you ever looked into how things are made, especially counterfeit items to save money?
01:32 PM veegee: Well if you're asking if I've been to China, no
01:33 PM veegee: but I do know how they're made, and you have to try really hard to get metal shitty enough to blow at 175 PSI
01:33 PM veegee: Like you can melt aluminum beer cans at home and cast it to make parts strong enough
01:33 PM gregcnc: maybe
01:33 PM Tom_L: cans are too thin
01:34 PM flyback: speaking of eh-holes
01:34 PM veegee: I normally cast Zamak at home because it flows better and melts easier
01:34 PM * flyback punts veegee
01:35 PM veegee: but I've done aluminum from american pennies and soda cans and if you use the right flux, you get decent castings. Nothing structural grade of course, but definitely nothing that'll blow at even 200 PSI as long as your casting isn't paper thin
01:36 PM gregcnc: 230PSI https://www.miltonindustries.com/blow-guns.html/turbo-blo-gun-with-adjustable-nozzle.html
01:37 PM veegee: gregcnc perfect, 3/8" NPT too
01:37 PM flyback: veegee,
01:37 PM flyback: probably nto 140pis
01:37 PM flyback: but people have turned higher pressure grease guns
01:37 PM flyback: into star trek hypo sprays
01:37 PM flyback: and been fucked up or died horribly
01:37 PM veegee: into what sprays?
01:37 PM flyback: from grease insjected into muscle or blood
01:37 PM flyback: thru skin
01:38 PM gregcnc: needleless syringe
01:38 PM veegee: wait what did they do to the grease guns?
01:38 PM flyback: high pressure ones
01:38 PM flyback: are a danger like this
01:38 PM gregcnc: accidental? misuse?
01:39 PM gregcnc: we all heard this about steam and hydraulics
01:39 PM flyback: accident but it's a dire warning about high pressure guns
01:39 PM veegee: Well yeah if you press thousands of PSI into your skin, that's how you make a needleless syringe like they use to mass vaccinate people
01:39 PM flyback: so be careful
01:39 PM flyback: CANUCK
01:39 PM * flyback headbutts veegee
01:40 PM veegee: but it really does take like 2,000 PSI
01:40 PM veegee: I'm talking about 175 PSI air blow gun
01:42 PM flyback: yeah I know but you could still shoot shit into an eye etc
01:42 PM flyback: just saying general be careful that's all
01:42 PM veegee: Oh well yeah I always wear PPE
01:55 PM Deejay: re
02:15 PM CaptHindsight: open source nuclear reactor plans https://www.open-100.com/
02:18 PM CaptHindsight: .obj format
02:20 PM gregcnc: start collecting smoke detectors now?
02:20 PM CaptHindsight: i guess
02:22 PM CaptHindsight: I wonder how much the kit will cost
02:25 PM gregcnc: can you 3d print it? is the big question
02:26 PM CaptHindsight: on the serious side, where are you expected to source the fuel from?
02:26 PM gregcnc: iran
02:27 PM CaptHindsight: it's a PR stunt, but for whom?
02:27 PM gregcnc: right, build a nukeplant of 1/10 the capacity for 1/3 the cost?
02:29 PM gregcnc: https://www.energyimpactcenter.org/
02:35 PM gregcnc: they think thye can make enough nuclear to remove all extra CO2 humans have put in the air. while also somehow turning nuclear waste into a product
02:36 PM pcw_home: Glow in the dark toys
02:40 PM CaptHindsight: pcw_home: what was the problem the other day with that HAL issue?
02:41 PM CaptHindsight: " halshow cant distinguish between pins and parameters of the same name"
02:43 PM pcw_home: The sserial devices provide a global dictionary and some of the global dictionary elements had the same name as process data
02:45 PM pcw_home: The sserial driver at some point (maybe to support STMBL) added every global dictionary item to the parameter list for the device
02:47 PM pcw_home: This causes problems when global dictionary items duplicate process data items (since linuxcnc does not distinguish between parameters and pins in many places)
02:48 PM pcw_home: in other words if you have a GDT item with name foo and a process item with name foo, what does "setp foo 23" do?
02:51 PM CaptHindsight: can't tell them apart
02:54 PM XXCoder: capt please dont turn into nuclear boy scout!
02:55 PM XXCoder: he died by playing wqith radioactives
02:56 PM XXCoder: interesting
02:56 PM CaptHindsight: nah, just posting the PR stunt
05:45 PM Deejay: gn8
07:57 PM Connor: Anyone know anything about oil groove cutting endmills? Trying to figure out what size to get, and where to get them..
07:58 PM Connor: https://www.schleiftechnik.com/en/oil-groove-milling-cutter-model-c,113-81
07:58 PM Connor: https://www.schleiftechnik.com/en/oil-groove-milling-cutter-model-k,113-143
07:58 PM Connor: I found that. I'm not sure which to get..
07:58 PM Connor: or, if I can find a domestic company that has them cheaper..
08:20 PM jdh: is the shape really that critical
08:55 PM skunkworks: https://youtu.be/xv9N-hqgvEg
09:09 PM skunkworks: http://electronicsam.com/images/greenmachine/2020-03-07-191256_1920x1080_scrot.png
09:21 PM XXCoder: huh whats that
09:21 PM skunkworks: I think andy calls it 'non circular boring...)
09:21 PM XXCoder: if youre testing machine you should do squared diamond circle
09:22 PM skunkworks: this would be machining a hex with a single point cutter.
09:23 PM Tom_L: what sort of test is this for?
09:24 PM skunkworks: this is hard to explain... think of a single point cutter in the spindle. As the spindle rotates it creates a path to 'shape' a polygon
09:25 PM XXCoder: https://encrypted-tbn0.gstatic.com/images?q=tbn%3AANd9GcQg-YmjYrbNeAS8jWTluPSt53r81azMf_4R-WYri5VahpEaYHYB
09:25 PM Tom_L: i get that... like engraving
09:25 PM XXCoder: interesting
09:26 PM Tom_L: i'd say if you can get a turners cube to come out right it's pretty close too
09:26 PM skunkworks: kinda like https://www.youtube.com/watch?v=T4q8gCpeY1A
09:26 PM skunkworks: except the cutter is in the spindle.
09:27 PM XXCoder: nice
09:28 PM XXCoder: but wouldnt broaching be easier?
09:28 PM skunkworks: what if you don't have a broach... ;)
09:28 PM Tom_L: or a hole deep enough for one
09:28 PM skunkworks: it is mainly a - I wonder how this would work...
09:29 PM XXCoder: https://www.youtube.com/watch?v=O2glVyU0_C0
09:30 PM skunkworks: that is cheating.
09:31 PM Tom_L: skunkworks, in your example is the spindle turning?
09:31 PM skunkworks: yes
09:32 PM skunkworks: a bit of math - the spindle angle moves the x/y axis
09:32 PM XXCoder: https://www.youtube.com/watch?v=DgB1psCFC7o
09:32 PM skunkworks: https://pastebin.com/Khsrh9TH
09:32 PM XXCoder: he makes broach
09:36 PM skunkworks: if I can find a cutter - I will try it tomorrow.
09:37 PM Tom_L: may make more sense then
09:42 PM skunkworks: right - not a perfect tool path. It should be more tangent to the shape.
09:50 PM skunkworks: probalby a pretty crappy tool path